Some fridges...
fits into a 19" rack... Then grab the front bezels of some old DELL servers and stick them to the front.
As those bezels are full of holes and gaps and general lack of design, grab a stack of old Hot-plug disks, cut the end with the locking arm off, connect wires to the LEDs in that piece and stick them to the door before placing the bezels.
For extra points, fit pressure transducers to the shelves and use an arduino to display the number of lagers on each shelf as a RED LED among the Green ones.
Yes, you can use a RPi to connect it to the network and show it all on a fancy website, but what's the fun in that?